236 lines
8.3 KiB
C++
236 lines
8.3 KiB
C++
// Copyright 2009-2021 Intel Corporation
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
#pragma once
|
|
|
|
/* include all node types */
|
|
#include "bvh_node_aabb.h"
|
|
#include "bvh_node_aabb_mb.h"
|
|
#include "bvh_node_aabb_mb4d.h"
|
|
#include "bvh_node_obb.h"
|
|
#include "bvh_node_obb_mb.h"
|
|
#include "bvh_node_qaabb.h"
|
|
|
|
namespace embree
|
|
{
|
|
/*! flags used to enable specific node types in intersectors */
|
|
enum BVHNodeFlags
|
|
{
|
|
BVH_FLAG_ALIGNED_NODE = 0x00001,
|
|
BVH_FLAG_ALIGNED_NODE_MB = 0x00010,
|
|
BVH_FLAG_UNALIGNED_NODE = 0x00100,
|
|
BVH_FLAG_UNALIGNED_NODE_MB = 0x01000,
|
|
BVH_FLAG_QUANTIZED_NODE = 0x100000,
|
|
BVH_FLAG_ALIGNED_NODE_MB4D = 0x1000000,
|
|
|
|
/* short versions */
|
|
BVH_AN1 = BVH_FLAG_ALIGNED_NODE,
|
|
BVH_AN2 = BVH_FLAG_ALIGNED_NODE_MB,
|
|
BVH_AN2_AN4D = BVH_FLAG_ALIGNED_NODE_MB | BVH_FLAG_ALIGNED_NODE_MB4D,
|
|
BVH_UN1 = BVH_FLAG_UNALIGNED_NODE,
|
|
BVH_UN2 = BVH_FLAG_UNALIGNED_NODE_MB,
|
|
BVH_MB = BVH_FLAG_ALIGNED_NODE_MB | BVH_FLAG_UNALIGNED_NODE_MB | BVH_FLAG_ALIGNED_NODE_MB4D,
|
|
BVH_AN1_UN1 = BVH_FLAG_ALIGNED_NODE | BVH_FLAG_UNALIGNED_NODE,
|
|
BVH_AN2_UN2 = BVH_FLAG_ALIGNED_NODE_MB | BVH_FLAG_UNALIGNED_NODE_MB,
|
|
BVH_AN2_AN4D_UN2 = BVH_FLAG_ALIGNED_NODE_MB | BVH_FLAG_ALIGNED_NODE_MB4D | BVH_FLAG_UNALIGNED_NODE_MB,
|
|
BVH_QN1 = BVH_FLAG_QUANTIZED_NODE
|
|
};
|
|
|
|
/*! Multi BVH with N children. Each node stores the bounding box of
|
|
* it's N children as well as N child references. */
|
|
template<int N>
|
|
class BVHN : public AccelData
|
|
{
|
|
ALIGNED_CLASS_(16);
|
|
public:
|
|
|
|
/*! forward declaration of node ref type */
|
|
typedef NodeRefPtr<N> NodeRef;
|
|
typedef BaseNode_t<NodeRef,N> BaseNode;
|
|
typedef AABBNode_t<NodeRef,N> AABBNode;
|
|
typedef AABBNodeMB_t<NodeRef,N> AABBNodeMB;
|
|
typedef AABBNodeMB4D_t<NodeRef,N> AABBNodeMB4D;
|
|
typedef OBBNode_t<NodeRef,N> OBBNode;
|
|
typedef OBBNodeMB_t<NodeRef,N> OBBNodeMB;
|
|
typedef QuantizedBaseNode_t<N> QuantizedBaseNode;
|
|
typedef QuantizedBaseNodeMB_t<N> QuantizedBaseNodeMB;
|
|
typedef QuantizedNode_t<NodeRef,N> QuantizedNode;
|
|
|
|
/*! Number of bytes the nodes and primitives are minimally aligned to.*/
|
|
static const size_t byteAlignment = 16;
|
|
static const size_t byteNodeAlignment = 4*N;
|
|
|
|
/*! Empty node */
|
|
static const size_t emptyNode = NodeRef::emptyNode;
|
|
|
|
/*! Invalid node, used as marker in traversal */
|
|
static const size_t invalidNode = NodeRef::invalidNode;
|
|
static const size_t popRay = NodeRef::popRay;
|
|
|
|
/*! Maximum depth of the BVH. */
|
|
static const size_t maxBuildDepth = 32;
|
|
static const size_t maxBuildDepthLeaf = maxBuildDepth+8;
|
|
static const size_t maxDepth = 2*maxBuildDepthLeaf; // 2x because of two level builder
|
|
|
|
/*! Maximum number of primitive blocks in a leaf. */
|
|
static const size_t maxLeafBlocks = NodeRef::maxLeafBlocks;
|
|
|
|
public:
|
|
|
|
/*! Builder interface to create allocator */
|
|
struct CreateAlloc : public FastAllocator::Create {
|
|
__forceinline CreateAlloc (BVHN* bvh) : FastAllocator::Create(&bvh->alloc) {}
|
|
};
|
|
|
|
typedef BVHNodeRecord<NodeRef> NodeRecord;
|
|
typedef BVHNodeRecordMB<NodeRef> NodeRecordMB;
|
|
typedef BVHNodeRecordMB4D<NodeRef> NodeRecordMB4D;
|
|
|
|
public:
|
|
|
|
/*! BVHN default constructor. */
|
|
BVHN (const PrimitiveType& primTy, Scene* scene);
|
|
|
|
/*! BVHN destruction */
|
|
~BVHN ();
|
|
|
|
/*! clears the acceleration structure */
|
|
void clear();
|
|
|
|
/*! sets BVH members after build */
|
|
void set (NodeRef root, const LBBox3fa& bounds, size_t numPrimitives);
|
|
|
|
/*! Clears the barrier bits of a subtree. */
|
|
void clearBarrier(NodeRef& node);
|
|
|
|
/*! lays out num large nodes of the BVH */
|
|
void layoutLargeNodes(size_t num);
|
|
NodeRef layoutLargeNodesRecursion(NodeRef& node, const FastAllocator::CachedAllocator& allocator);
|
|
|
|
/*! called by all builders before build starts */
|
|
double preBuild(const std::string& builderName);
|
|
|
|
/*! called by all builders after build ended */
|
|
void postBuild(double t0);
|
|
|
|
/*! allocator class */
|
|
struct Allocator {
|
|
BVHN* bvh;
|
|
Allocator (BVHN* bvh) : bvh(bvh) {}
|
|
__forceinline void* operator() (size_t bytes) const {
|
|
return bvh->alloc._threadLocal()->malloc(&bvh->alloc,bytes);
|
|
}
|
|
};
|
|
|
|
/*! post build cleanup */
|
|
void cleanup() {
|
|
alloc.cleanup();
|
|
}
|
|
|
|
public:
|
|
|
|
/*! Encodes a node */
|
|
static __forceinline NodeRef encodeNode(AABBNode* node) { return NodeRef::encodeNode(node); }
|
|
static __forceinline NodeRef encodeNode(AABBNodeMB* node) { return NodeRef::encodeNode(node); }
|
|
static __forceinline NodeRef encodeNode(AABBNodeMB4D* node) { return NodeRef::encodeNode(node); }
|
|
static __forceinline NodeRef encodeNode(OBBNode* node) { return NodeRef::encodeNode(node); }
|
|
static __forceinline NodeRef encodeNode(OBBNodeMB* node) { return NodeRef::encodeNode(node); }
|
|
static __forceinline NodeRef encodeLeaf(void* tri, size_t num) { return NodeRef::encodeLeaf(tri,num); }
|
|
static __forceinline NodeRef encodeTypedLeaf(void* ptr, size_t ty) { return NodeRef::encodeTypedLeaf(ptr,ty); }
|
|
|
|
public:
|
|
|
|
/*! Prefetches the node this reference points to */
|
|
__forceinline static void prefetch(const NodeRef ref, int types=0)
|
|
{
|
|
#if defined(__AVX512PF__) // MIC
|
|
if (types != BVH_FLAG_QUANTIZED_NODE) {
|
|
prefetchL2(((char*)ref.ptr)+0*64);
|
|
prefetchL2(((char*)ref.ptr)+1*64);
|
|
if ((N >= 8) || (types > BVH_FLAG_ALIGNED_NODE)) {
|
|
prefetchL2(((char*)ref.ptr)+2*64);
|
|
prefetchL2(((char*)ref.ptr)+3*64);
|
|
}
|
|
if ((N >= 8) && (types > BVH_FLAG_ALIGNED_NODE)) {
|
|
/* KNL still needs L2 prefetches for large nodes */
|
|
prefetchL2(((char*)ref.ptr)+4*64);
|
|
prefetchL2(((char*)ref.ptr)+5*64);
|
|
prefetchL2(((char*)ref.ptr)+6*64);
|
|
prefetchL2(((char*)ref.ptr)+7*64);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* todo: reduce if 32bit offsets are enabled */
|
|
prefetchL2(((char*)ref.ptr)+0*64);
|
|
prefetchL2(((char*)ref.ptr)+1*64);
|
|
prefetchL2(((char*)ref.ptr)+2*64);
|
|
}
|
|
#else
|
|
if (types != BVH_FLAG_QUANTIZED_NODE) {
|
|
prefetchL1(((char*)ref.ptr)+0*64);
|
|
prefetchL1(((char*)ref.ptr)+1*64);
|
|
if ((N >= 8) || (types > BVH_FLAG_ALIGNED_NODE)) {
|
|
prefetchL1(((char*)ref.ptr)+2*64);
|
|
prefetchL1(((char*)ref.ptr)+3*64);
|
|
}
|
|
if ((N >= 8) && (types > BVH_FLAG_ALIGNED_NODE)) {
|
|
/* deactivate for large nodes on Xeon, as it introduces regressions */
|
|
//prefetchL1(((char*)ref.ptr)+4*64);
|
|
//prefetchL1(((char*)ref.ptr)+5*64);
|
|
//prefetchL1(((char*)ref.ptr)+6*64);
|
|
//prefetchL1(((char*)ref.ptr)+7*64);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* todo: reduce if 32bit offsets are enabled */
|
|
prefetchL1(((char*)ref.ptr)+0*64);
|
|
prefetchL1(((char*)ref.ptr)+1*64);
|
|
prefetchL1(((char*)ref.ptr)+2*64);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
__forceinline static void prefetchW(const NodeRef ref, int types=0)
|
|
{
|
|
embree::prefetchEX(((char*)ref.ptr)+0*64);
|
|
embree::prefetchEX(((char*)ref.ptr)+1*64);
|
|
if ((N >= 8) || (types > BVH_FLAG_ALIGNED_NODE)) {
|
|
embree::prefetchEX(((char*)ref.ptr)+2*64);
|
|
embree::prefetchEX(((char*)ref.ptr)+3*64);
|
|
}
|
|
if ((N >= 8) && (types > BVH_FLAG_ALIGNED_NODE)) {
|
|
embree::prefetchEX(((char*)ref.ptr)+4*64);
|
|
embree::prefetchEX(((char*)ref.ptr)+5*64);
|
|
embree::prefetchEX(((char*)ref.ptr)+6*64);
|
|
embree::prefetchEX(((char*)ref.ptr)+7*64);
|
|
}
|
|
}
|
|
|
|
/*! bvh type information */
|
|
public:
|
|
const PrimitiveType* primTy; //!< primitive type stored in the BVH
|
|
|
|
/*! bvh data */
|
|
public:
|
|
Device* device; //!< device pointer
|
|
Scene* scene; //!< scene pointer
|
|
NodeRef root; //!< root node
|
|
FastAllocator alloc; //!< allocator used to allocate nodes
|
|
|
|
/*! statistics data */
|
|
public:
|
|
size_t numPrimitives; //!< number of primitives the BVH is build over
|
|
size_t numVertices; //!< number of vertices the BVH references
|
|
|
|
/*! data arrays for special builders */
|
|
public:
|
|
std::vector<BVHN*> objects;
|
|
vector_t<char,aligned_allocator<char,32>> subdiv_patches;
|
|
};
|
|
|
|
typedef BVHN<4> BVH4;
|
|
typedef BVHN<8> BVH8;
|
|
}
|